filename_case

Basename (stem only or full) matches a case convention: snake, kebab, pascal, camel, screaming-snake, flat, lower, upper.

- id: rust-snake-case
  kind: filename_case
  paths: "crates/**/src/**/*.rs"
  case: snake
  level: error

Fix: file_rename — converts the stem to the configured case, preserving extension.

Options

Option	Type	Required	Default	Description
`case`	one of `lower` \| `lowercase` \| `upper` \| `uppercase` \| `pascal` \| `pascalcase` \| `PascalCase` \| `UpperCamelCase` \| `upper_camel` \| `upper_camel_case` \| `camel` \| `camelcase` \| `camelCase` \| `lowerCamelCase` \| `lower_camel` \| `lower_camel_case` \| `snake` \| `snakecase` \| `snake_case` \| `kebab` \| `kebabcase` \| `kebab-case` \| `dash` \| `dashcase` \| `dash-case` \| `screaming-snake` \| `screamingsnake` \| `screamingsnakecase` \| `SCREAMING_SNAKE_CASE` \| `upper_snake` \| `upper_snake_case` \| `flat` \| `flatcase`	yes

Plus the common paths, level, id, and when fields. This table is generated from the JSON Schema; option types and defaults are authoritative.